Williamson Genealogy Notes, Cos. Donegal, Ireland & Tyrone, Northern Ireland 1834-69 <https://www.cotyroneireland.com/surnames/williamson.html> Williamson Genealogy Notes, Co. Londonderry, Northern Ireland 1834-69 <https://www.cotyroneireland.com/surnames/williamson2.html> Thanks again to Len Swindley for two more great additions to CTI! Jim McKane Kitchener, Ontario